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- UNITED STATES PATENT OFFICE.

JOEL H. PAGE, or PHILADELPHIA, PENNSYLVANIA, AssIeNoR on ONE-HALF TOBLANCH CARRIE KING, OF SAME PLACE.

SPECIFICATION forming arser Letters Patent No. 297,626, dated April 29,1884.

Application filed December 28, 1883. (N o specimens.)

I To aZZ whom it may concern:

Be it known that I,.-JOEL H. PAGE, 2. citizen of the United States,residing at. the city of Philadelphia, inthe county ofPhiladelphia, inthe State of Pennsylvania, have invented a certain new and usefulImprovement in an Indestructible Compound for Coating Wires forElectrical Purposes, of which the following is a specification, whichwill enable others skilled. in the art to which itappertains to make anduse the-same. My design is to produce, at very little cost, a means ofprotecting wires used for electric purposes, especially those used forunderground purposes; and such means consist in embedding them in amoisture-proof, anti-induction, non-conducting compound, which, whenhardened, will form a solid mass of wire and compound, thereby obviatingthe necessity of expensive leaden or other metallic means of protection,and which will cheaply protect the wires from any and all of undergroundinfluenees which heretofore have prevented the general use ofunderground electric circuits, except at great expense.

To'car'ry my invention into effect, I make a compound of the fusedprotoxide of lead,

known to the arts as lithargefl and thoroughly incorporate with it aportion of glycerine barely sufficient to make of both a thick paste.The wires are then stretched the desired distance apart in a conduit ormold, and the compound, in the form of a thick paste, is then pouredupon the wires; and it is obvious that the paste will fill interveningspaces, and when hard will form a solid mass. Then the apparatus forseparating the wires and keeping them taut can be moved, and theoperation repeated.

v I am, well aware that a composition of the same materials has beenalready used as a joint-packing for vapor-engines, and that acomposition of lamp-black, asbestus, litharge, and glycerine has beforemy invention been used forlining and coating pipes, tubes, cylinders,&c., and as a joint-packing; but I believe myself to be the first whohas discovered that by coating wires intended for electric purposes withmy almost inexpensive compound hereinbefore' described a cheap andeffectively-insulated electric wire is provided.

Having sufficiently set forth the-mode of making and using my compound,I claim 1AA compound of litharge and glycerine, formed into a thickpaste, for coating wires to be used for electric purposes, substantiallyas hereinbefore described.

2. Electric wires coated with a compound of litharge and glycerine,substantially as set forth and described.

JOEL H. PAGE. Witnesses:

WM. L. NEvIN, AUG. W. KING.

